摘要
树脂吸附作为一种高效的处理技术,因操作简单、吸附选择性高、再生性能好等优势而受到广泛关注。为了提升树脂对污染物的去除性能,绿色环保、经济高效、适用性广的新型吸附树脂的开发成为研究热点。本文以天然松香为原料,制备了一种新型的乙二胺松香基树脂(Ethylenediamine rosin-based resin,EDAR),同时在单一及混合体系中进行了EDAR吸附Cu(Ⅱ)和4-硝基苯酚(4-NP)的实验。结果表明,在单一体系中,EDAR对Cu(Ⅱ)和4-NP的吸附容量在pH=5.0~6.0时达到最大。在混合体系中,随着pH值升高,4-NP对EDAR吸附Cu(Ⅱ)具有一定的抑制作用(pH=4.0~6.0),Cu(Ⅱ)对EDAR吸附4-NP有明显的抑制作用。4-NP在EDAR上的吸附行为更符合Langmuir模型,Cu(Ⅱ)在EDAR上的吸附行为更符合Freundlich模型,吸附过程可由准二级动力学模型描述。Cu(Ⅱ)和4-NP在混合体系中的吸附量,相比单一体系有所降低,说明Cu(Ⅱ)和4-NP之间存在竞争吸附。在混合体系中,经过5次循环后,EDAR对Cu(Ⅱ)和4-NP的吸附及脱附性能仍然较好。EDAR对Cu(Ⅱ)和4-NP的吸附机理包括络合作用、架桥作用及氢键作用。
As an efficient treatment technology,resin adsorption has attracted widespread attention due to its advantages such as simple operation,high adsorption selectivity and good regeneration performance.In order to improve the removal performance of the resin for pollutants,the development of new adsorption resins that are environmentally friendly,cost-effective and widely applicable has become a research hotspot.In this study,a new type of ethylenediamine rosin-based resin(EDAR)was prepared using natural rosin as the raw material.Meanwhile,the adsorption experiments of EDAR for Cu(Ⅱ)and 4-nitrophenol(4-NP)in single and binary systems were carried out.The results showed that in the single system,the adsorption capacities of EDAR for Cu(Ⅱ)and 4-NP reached the maximum within the pH range of 5.0~6.0.In the binary system,the presence of 4-NP had an inhibitory effect on the adsorption of Cu(Ⅱ)by EDAR as the pH increased(pH=4.0~6.0),while Cu(Ⅱ)had a significant inhibitory effect on the adsorption of 4-NP on EDAR.The adsorption behavior of the adsrption behaviorx of Cu(Ⅱ)on EDAR was more in Line with the Freundlich model,and the adsorption process could be described by the pseudo-second-order kinetic model.Meanwhile,the adsorption amounts of both in the binary system were lower than those in the single system,indicating that there was competitive adsorption between Cu(Ⅱ)and 4-NP.In the binary system,the adsorption and desorption performances of EDAR for Cu(Ⅱ)and 4-NP remained good after 5 cycles.The adsorption mechanism of EDAR for Cu(Ⅱ)and 4-NP include complexation,bridging and hydrogen bonding.
作者
王宇航
刘敏
许谦
雷福厚
董慧峪
汤睿
刘绍刚
WANG Yuhang;LIU Min;XU Qian;LEI Fuhou;DONG Huiyu;TANG Rui;LIU Shaogang(State Key Laboratory of Forestry Chemistry and Engineering,Guangxi Key Laboratory of Forestry Chemistry and Engineering,Guangxi Collaborative Innovation Center of Forestry Chemistry and Engineering,School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530008,China;Guangxi Nanning Water Co.,Ltd.,Nanning 530031,China;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Science,Chinese Academy of Science,Beijing 100085,China)
出处
《化工技术与开发》
2025年第10期75-82,共8页
Technology & Development of Chemical Industry
基金
广西民族大学研究基金会人才引进研究启动项目(2024KJQD207)
广西自然科学基金青年科学基金项目(2025GXNSFBA069126)。
关键词
松香基树脂
酚类化合物
重金属
吸附
rosin-based resin
phenolic compounds
heavy metals
adsorption
